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The Anti-interference Research of Cell in LTE System

Author: ZhouQingTao
Tutor: DongShuRong;ZengGuoYong
School: Zhejiang University
Course: Electronics and Communication Engineering
Keywords: LTE ICIC Interference coordination Power Control Interference OFDM PTN
CLC: TN929.5
Type: Master's thesis
Year: 2012
Downloads: 140
Quote: 0
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With the rapid development of mobile communication technology, mobile communications from the development of first-generation mobile communications systems to the current quasi-four-generation mobile communication systems, the business of telecommunications technology to the development of mobile, broadband and multimedia direction gradually, as adapt to the development of the mobile communication technology, network architecture, to initiate and develop standards become an urgent task, 3GPP has proposed a series of new standards, which long-term evolution of the wireless access technology by the people and the core network attention to the field of mobile communications become the new hot spot of the 3G technology after. But because of the LTE system uses the re-use factor of 1 or close to 1, so that the inter-cell interference is very serious, limiting the improvement of the system throughput, therefore, this topic topic inter-cell interference suppression techniques and conducted research has important research significance. In this thesis, the three sections: power control, frequency multiplexing and packet transport network technologies and improve efficiency. (1) LTE power control technology research. Made a theoretical analysis of the LTE system model, including the structure of the E-UTRAN and the LTE physical layer OFDM communication model, on this basis, the cell interference causes and solutions in terms of interference. By contrast the main solutions: interference random interference elimination and interference coordination obtained interference coordination is better than the interference random and interference cancellation conclusion, and interference coordination program focused on the analysis of certain interference coordination scheme inadequacies based on an interference coordination method and applied for a patent. The power control technology is one of the important measures to suppress interference, the papers off loop power control, closed-loop power control and overload indication control scheme analysis and research, and power control solutions. (2) frequency reuse. LTE system model and frame structure, radio propagation model, cell distribution model, interference model and system capacity based on a semi-static interference coordination scheme to build a 19-cell interference model analysis of the simulation process and related performance evaluation parameters, and then the system interference model simulation, through a large number of simulation, the new method proposed a resource scheduling, its effectiveness is verified by simulation, and resource scheduling new method of signal-to-noise ratio probability distribution, the cumulative function , throughput, spectrum efficiency parameters are to do a more in-depth analysis. The interference model structure of the LTE system interference has a very important significance for the actual test, it can save a lot of resources and provide a feasible method and basis LTE anti-jamming research to improve the throughput and spectrum efficiency is of great significance. (3) packet transport network technologies. Proposed method, one can increase the utilization efficiency of the network, especially when the circumstances of the case of network congestion and signal instability deterioration set conditions intermittently open the management port, this working mechanism of the management port of the network to the network protection feature is not destroyed at the same time, improve the utilization efficiency of the network.

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